No. It just seems that they are taught to hunt fastballs. The team as a whole is reluctant to swing at off speed pitches and when they do, they usually look bad doing it.
I would like to see more of a zone hitting approach. Look for pitches in certain areas on certain counts.
If you're looking fastball down the middle, but get a curveball right down the middle, it shouldn't matter. Both pitches should be crushed. Too many times we are flat footed on a get-me-over hanging curveball.
The speed shouldn't matter if the ball is thrown to a spot you're looking for. Good hitters can hit the fastball and offspeed pitches equally as well. It's an approach that has to be practiced to become habit.
Clearly, we don't do that.